2 Highlight of Current Activities (1)4 working groups (including 3 technical working groups) have been constituted in ARIB-MMAC (Multimedia Mobile Access Communications System) Forum to make technical investigation, study on system specifications, liaison with other standardization bodies, promotion of demonstrative experiments and popularization activities.Promotion-WGPlanning and managing promotion and popularization activities of the ForumMMAC WGModification of ARIB STD-T71, incorporating introduction of high-speed wireless LAN in the 5GHz bandLiaison with IEEE for updating ARIB STD-T71(TGn etc.)Maintaining the standard of ARIB STD-T71 and drafting its revisionsUWB-WGInvestigation of the discussion of interference mitigation function for UWB (Ultra Wide Band) system in Europe and Japan. Planning and promotion of UWB (Ultra Wide Band) demonstrative experiments.Provision of information regarding the investigation of interference mitigation function in Japan to ECC and ETSI.Exchange of information regarding the interference mitigation function among Asian countries.Maintaining the standard of ARIB STD-T91 and drafting its revisions.Establishment of residential backbone network sub-working group.mmWPAN-WGStudy on standardization of millimeter-wave wireless PAN (Personal Area Network)Making a draft standard of millimeter- wave wireless PAN in Japan

3 Highlight of Current Activities (2)MMAC WG activitiesDeveloping standards to define specifications for broadband mobile access communication system using CSMACurrently maintaining the ARIB STDs T66 and T71T66 : for 2.4GHz systems (802.11b and g)T71 : for 4.9, 5.2, 5.3 and 5.6GHz systems (802.11j, 11a and 11n)Recently completed work:Following standards were revised in last year reflecting Japanese Radio Regulation change;ARIB STD T71 version 4.0 (May. 2007).Align with the 5.6GHz allocation for wireless LAN systems, technical requirements for the system using 5.6GHz band( GHz) were addedMitigation of limitation for 5.2 and 5.3GHz bands; inside traveling trains were assumed as indoor environment and use of 5.2 and 5.3GHz were permittedARIB STD T71 version 5.0 (Dec. 2007).Technical requirements for channel-bonded 40MHz operation were addedLiaison with IEEE for updating ARIB STD T71Carefully watching the activities and directions of IEEE task groups; e.g. TGn(high-throughput) and TGs(mesh networking)

4 Strategic DirectionARIB standards development on Wireless LAN systems based on IEEE standards and Japanese Radio RegulationsContents of published IEEE standards should be reflected into ARIB STD T71Reflection of draft phase standards (e.g. IEEE802.11n D.2.0) into ARIB STD T71 will be discussed and decided in MMAC WGChanges of Japanese Radio Regulations will be reflected into ARIB STD as soon as possibleModification of ARIB standards consider the certification programs of following industrial organizations;Wi-Fi AllianceCertification program that guarantees interoperability between wireless LAN access points and wireless terminalsTELEC (Telecom Engineering Center)Certification that specified radio equipment conforms to the technical regulations based on the Radio Regulation of Japan

5 ChallengesDue to the differences of standardization process, some gaps exist among their documents or (draft) standardsCurrent version of ARIB STD-T71 is described based on Japanese Radio Regulation and it refers IEEE802.11n draft 2.0 standardIEEE TGn is revising the draft almost once two month and the latest version is 4.0Wi-Fi Alliance has already started the IOT (Inter operability test) program based on IEEE802.11n draft 2.0 standardDifferences and discrepancies among documents and standards mentioned above should be absorbed and new version of ARIB STD-T71 to be publishedNo documents or standards exist regarding ad-hoc networking in MMAC WGTo be discussed

6 Next Steps/ActionsMMAC802.11WG to maintain ARIB STD-T71 and revise it align with activities of other standard bodies and industrial organization such as IEEE802.11, Wi-Fi Alliance and TELECIn MMAC, Wide Area Ubiquitous Network-WG (tentative name) will be newly constituted in 2008Study on the wide area ubiquitous network system using many simple radio data terminals distributed over a wide area which perform data communications and information processingDevelopment techniques for the wide area ubiquitous network

9 What is MMAC?ObjectiveThe objective of the Forum is to realize MMAC(Multimedia Mobile Access Communication Systems) as soon as possible through investigations of system specifications, demonstrative experiment, information exchange and popularization activities and thereby contribute to the efficient use of radio frequency spectrum.Activities1. Investigation2. Study on system specifications3. Demonstrative experiment4. Information exchange and popularization activities5. Other businessEstablishmentDecember 4, 1996

19 Public WiFi Service AreasAirportMajor airportsPublic WLAN services availableFree wireless access as Airport lounge service for business class/first class customers (Tokyo/Narita, Osaka etc.)Railway stationMajor private railway stations in Tokyo metropolitan areasAll stations of “Keikyu railway”, “Tokyo metro subways” and “Tokyo municipal subways” (Tokyo and Kanagawa area)Major hotels, cafes and restaurantsOn the trainWiFi train service available on “Tsukuba Express”Public wireless LAN services of NTT East and NTT DoCoMo are available all the way from “Akihabara” to “Tsukuba”WiFi service on bullet train “Shinkansen” from Tokyo to Osaka will be available next year